HLP 68 from ADDINOL
The hydraulic oil HLP 68 is particularly suitable as pressure fluid for industrial and mobile hydraulic systems of different types. It must withstand high thermal loads, prevent corrosion when water is supplied and minimise wear when mixed friction occurs. The oil can be used well at a pressure of over 200 bar.
The designation HLP 68 comes from the letter code "HLP" of hydraulic fluids according to DIN 51524-2 and the number "68", which refers to the standardized ISO VG class. These are hydraulic oils with anti-ageing and anti-corrosion additives as well as active agents for reducing friction and wear.
Our HLP 68 hydraulic oils
HLP 68 features
The HLP 68 hydraulic oils are characterised by the following properties:
- Very good demulsifying ability and good water separation ability
- Excellent air release ability and low foaming tendency
- Good compatibility with the usual sealing and coating materials
- Excellent wear protection properties
- High thermal-oxidative stability
- Listed or accepted by numerous manufacturers of aggregates and components
- High purity
The classification of hydraulic oils HLP according to DIN 51524-2 refers to the cleanliness class of the oil (no foreign matter in the production process), the demulsifying behaviour (water separation), the air separation ability and the foaming behaviour. For these aspects, specific limit values are defined which the hydraulic oil must not exceed if it is to be classified as HLP. The HLP lubricants from ADDINOL clearly fall below the limit values and thus exceed the requirements of DIN 51524-2.
HLP 68 temperature range
Hydraulic oils marked HLP 68 by ADDINOL have a pour point of approx. -24 °C. At this temperature, the oil is barely flowable. The flash point is about 270 °C. At this temperature the oil starts to evaporate. However, the optimum operating temperatures are not directly at the exteriors, but range between -20 °C and 90 °C. Within this temperature range, the lubricating film of the oil remains stable and optimally protects the hydraulics.
HLP 68 viscosity
The viscosity of HLP 68 refers to the defined viscosity class of ISO VG (International Organization for Standardization Viscosity Grade). This describes that the kinematic viscosity of the hydraulic oil at 40 °C must be between 61.2 and 74.8 mm²/s. The centre point viscosity is exactly 68 mm²/s. Oil of ISO VG class 68 has approximately the flow behaviour of an edible oil. It is relatively thin if the ISO VG scale from 2 (very thin) to 1500 (viscous) is used as a basis.